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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Changes in Unrecognized Tax Benefits |  |  |
Beginning balance, Unrecognized tax benefits | $ 39.3 | $ 42.2 | $ 45.5
Additions based on tax positions related to the current year | 0.3 | 0.3 |
Reductions for tax positions related to the current year | (3.2) | (3.2) | (3.3)
Ending balance, Unrecognized tax benefits | 36.4 | 39.3 | $ 42.2
Amount of unrecognized tax benefits that would reduce the effective income tax rate, if recognized | 1.6 |  |
Accumulated pre-tax interest and penalties related to unrecognized tax benefits | $ 2.0 | $ 1.8 |

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